Credit: The Associated Press

U.S. Secretary of State John Kerry meets staff members at the U.S. Embassy in Islamabad, Pakistan, Thursday, Aug. 1, 2013. The Obama administration hasn't sent its top diplomat to Pakistan since 2011, and Kerry's trip is a chance for the former senator to get to know the newly elected prime minister, Nawaz Sharif, who came to power in Pakistan's first transition between civilian governments. (AP Photo/Jason Reed, Pool)

ISLAMABAD — The United States and Pakistan agreed Thursday to restart high-level talks on security and other issues, yet the two sides still deeply mistrust each other in a relationship frayed by disputes over issues like U.S. drone attacks, which U.S. Secretary of State John Kerry said could end soon.